Pedestal-table lock.



, No. ssn ogj PATENTED JULY 23, 1907.

. ELI'YDBN.

PEDESTAL TABLE LOOK.

APPLICATION FILED MAR. 28. 1907.

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f 7 m llllll Hlllll' l v) Q 3 anaaiiii iw I a I a I 3L g 3 1 1 i /5 i No. 860,709. PATENTED JULY 23, 1907. E.TYDEN. PEDESTAL TABLE LOCK.

APPLICATION nun) MAR. 28. 1907.

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5 93 Fay 40 w illllllllllllm W Z7782? @65672 9/1 W W I 7ajs fifyp EMIL TYDEN, OF HASTINGS, MICHIGAN.

PEDESTAL IABLE LOCK.

Specification of Letters Patent.

Patented July 23, 1907.

[application filed March 28,1907. Serial No. 365,175.

To all whom it may concern:

Be it known that I, EMIL TYDEN, a citizenof the United States, residing at Hastings, in the county of Barry and State of Michigan, have invented new and useful Improvements in Pedestal-Table Locks, of which the following is a specification, reference being had to 'the accompanying drawings, forming a part thereof.

This invention relates to devices for securing together the separable parts of pedestal tables.

It consists of the features and elements of construction shown and described as indicated in the claims.

In the drawings :Figure l is a longitudinal vertical section of a pedestal table equipped with this invention showing the parts at locked and secured position. Fig. 2 is a detail view similar to Fig. 1 showing the parts at unlocked position. Fig. 3 is a section at the line 33 on Fig. 1. Fig. 4 is a detail section similar to Fig. 1, but showing only the middle portion of the height of the pedestal, illustrating a modified form of this invention. Fig. 5 is a view similar to Fig. 2 showing the parts in released or unlocked position. Fig. 6' is a view similar to Fig. 4 showing a. second modification. Fig, 7 is a similar view showing in released or unlocked position the modification represented in Fig. 6.

The form shown in Figs. 1, 2 and 3 will first be described. The two pedestal members, 1 and 2, having secured to them respectively the separable parts of the table top, 3 and 4, are connected together in the usual manner by the slides, of which one is shown at 5, the center leg, 6, being carried in the usual manner by the cross bar, 7, attached to the middle slides in the usual manner. Upon the pedestal member, 1, about midway in its height, there is pivoted by means of a bracket, 8, a bell-crank lever, 9, to one of whose arms there is connected a link or pull rod, 10, which extends up along the inner side of the pedestal member to the top thereof where it is connected to the horizontal arm of the bell-crank lever, 11, from whose vertical arm a pull rod, 12, extends longitudinally with respect to the table toward one end where it is connected to an operating and locking lever, 13, of familiar construction in this class of device, and operating for the familiar purpose of locking and secur ing the locking parts at locked position by throwing the pivot of the rod, 12, past the center of the operating lever. To the other arm of the bell-crank lever, 9, there is pivoted a latch, 14, having its free end provided with a slope-faced hooked nose, 14, which engages any suitable device, as the staple bracket, 15, secured upon the pedestal member, 2. The latch, 14, has a tail or heel terminal, 14*, which engages the lower edge of the bell-crank lever, 9, and also the lower edge of the bracket, 8, for checking the swinging movement of the latch downward about its pivotal connection to said lever. In the normal condition of the parts when free from any locking or securemcnt, the weight of the rod, 10, operating on the arm of the lever, 9, to which it is connected counter-balances the latch, 14, which normally, when its tail or heel piece, 14", is stopped against the bellcrank lever, would swing the two parts,latch and lever,as one about the fulcrum, 16, and causes said latch to extend normally horizontally toward the opposite pedestal member, its upward swinging movement beyond such position being checked by a stop nut, 10, at the upper end of the link or pull rod, 10, above the lever, 11. When in this position the two pedestal members are moved toward each other. The slopefaced hooked nose, 14, of the latch rides up on the cross bar, 15 of the staple bracket, 15, and drops behind the same engaging the two pedestal members together. This happens before they are entirely closed together, and

the operator by means of the lever, 13, drawing on the rod, 12, and rocking the bell-crank lever, 11, to pull upward the rod, 10, causes the bell-crank lever, 9, to draw inwardthat is,'back toward the pedestal member, 1,the latch, 14, and thereby draws the two pedestal members tightly together, the operating lever, 13, coming to locked position,with the pivot of the link, 12, behind the fulcrum of the lever,by the time said pedestal members are drawn snugly together. For releasing the locking device when the table is to be extended the lever, 13, is rocked inward,that is, toward the center of the table,slacking the connections and being further pushed inward the rod, 10, is thrust downward and the bell-crank lever, 9, and latch, 14, rock as a single element about the fulcrum, 16, of the lever disengaging the nose of the latch from the staple and permitting the pedestal members to be drawn apart.

In Figs. 4 and 5 there is illustrated a modification. In this form, instead of the bell-crank lever, 9, there is employed a straight lever or link 9, which is fulcrumed to the bracket, 8, mounted on one pedestal member and operated by the rod or link, 10, as in the other form, the latch, 14", being pivotally connected to the lever intermediate its fulcrum and the connection of the operating rod, 10, and being stopped on the link or lever, 9, and also on the tongue, 8*, of the bracket, 8, in the direction in which it moves for engaging the staple, 15, having freedom of movement in the direction for disengagement from the staple. The pivotal connection of the latch to the lever, 9 and the trend of the lever, 9-, from its fulcrum at the unlocked position of the parts is such that when the lever is pulled up by the rod, 10, the latch is drawn back toward the pedestal member, 1, as in the other form, and operates in the same manner as said other form for drawing the pedestal members together. In releasing the latch the operation is substantially the same as in the other form, to wit, that upon depressing the rod, 10, the lever, 9,

and latch 14, move together as one part, swinging about the fulcrum of the lever for lifting the latch out of the staple. In both the forms above described a spring, 17, may be provided to yieldingly hold the latch nose in position for encountering the stops. A convenient location for such spring is, as shown, the spring being coiled about the rod, 10, stopped at the lower end by a stop, 10 on the rod, and at the upper end against the guide bearing, 10

The provision in both the forms above described for stopping the latch, not only on the lever by which it is operated, but also on the bracket to which that lever is pivoted, is desirable in order that the accidental or inadvertent operation of the operating connections by the lever, 13, when the table is extended may not have the effect of throwing the latch down to a position too low for encounter of its slope-faced nose with the staple bar, 15. In the first described form it will be seen that such operation with the latch out of engagement with the staple and unsupported at its hooked end would cause the tail projection, 14 to slide back on the under edge of the bracket, the latter causing the latch to be upheld in'substantially horizontal position throughout the entire movement of the parts. In the second form above described a similar action of the operating parts while the table is extended with the latch unsupported at its hooked end would cause the heel edge, 14 of the latch to slide up along the forward edge of the projection, 8, of the bracket, 8; and said heel edge of the latch being sloped so that it would be at that position substantially parallel to the chord of the arc in which the pivot of the latch to the lever would be moving, the action is substantially the same as results in the other form from the sliding of the projection, 14, along the approximately horizontal lower edge of the bracket which is also substantially parallel to the chord of the arc in which in that form the pivot of the latch to the lever travels in such action.

In Figs. 6 and 7 there is shown a second modification. In this form the bell-crank lever, 9 is substituted for the bell-crank lever, 9, of the first described form, its downwardly extending arm having the stud, 90, for engagement with the latch, 14 which in this construction is pivotally mounted upon the opposite pedestal member and has its sloping hooked nose turned upward for engaging the stud, 90, a spring, 20, being provided reacting against the heel, 17 oi' the latch to uphold its hooked end. In the device in this form, the latch, 14 yields upon the encountering of the sloped face of its hooked nose with the stud, 90, to permit the nose to pass over ,the studand engage behind it. Such engagement having been effected before the pedestal members are fully closed together, the operator pulling up the operating rod, 10, by the means provided as shown in Fig. 1, causes the depending arm of the bellcrank lever, 9 to swing inward toward the pedestal lever, l, and thereby draw the two pedestal members snugly together. For releasing, the rod, 10, would be depressed to the position shown in Fig. 7 the stud, 90, being thereby lifted entirely out of the hook of the latch 14 so that the table members may be spread.

I claim:

1. In a pedestal table locking device, in combination with the two members of the pedestal, a bell-crank lever fulcrumed upon one oi. them; an engaging device mounted upon the other; means carried by one arm of the bell crank lever for engaging said engaging device, and means connected with the other arm 01 the lever for rocking it to draw the pedestal members together after such engagement,

2. In a pedestal table locking device, in combination with the two members of the pedestal a latch upon one of them and a device for engaging" the latch upon the other; a bell-crank lever fulcrumcd upon the first member having the latch pivotally connected to one of its arms, and opcrating means connected to the other arm and extending therefrom to the margin of the table for operating it to rock the lover.

I In a pedestal table locking device, in combination with the two members of the pedestal a latch upon one of them and a device for engaging the latch upon the other; a lever fulcrumed upon the first member having the latch pivotally connected to it; means stopping the latch and lover relatively to each other to cause them to operate as one piece in the movement of the lever for disengaging the latch, and operating connections from the lever extending to the margin of the table.

4, In a pedestal table locking device, in combination with the two members of the pedestal, a bell-crank lever fulcrumcd upon one of them; an engaging device mounted upon the other; means carried by one arm of the bellcrank lever l'or engaging said engaging device; means connected with the other arm of the lever for rocking it to draw the pedcstal members together after such engagement, and means for locking said operating means at the limit of the table-closing movement.

5. in a pedestal table locking device, in combination with the two members of the pedestal, a latch upon one of them and a device for engaging the latch upon the other; a lever fulcrumed upon the first member having the latch pivotally connected to it; means stopping the latch and the lever relatively to each other to cause them to operate as one piece in the movement of the lever for disengaging the latch. and a stop fixed with respect to the fulcrum of the lever, the latch having a part which encounters said step when the lever is rocked for the latch-engaging move ment while the table is spread too far for the engagement to occur, said step and the portion of the latch encountering the same being relatively shaped to prevent substantial depression of the engaging end of the latch during such movement.

In testimony whereof, I have hereunto set my hand at Chicago, Ill., this 25th day of March, 1907.

EMIL TYDEN.

Witnesses (firms. S. BURTON, EDWARD 'l. WRAY. 

